TOA – DA250DH – Amplifier – Power 2 x 250 Watt – 100 Volt – 1RU Class D

$2,529.00 RRP Inc GST


TOA DA250DH Class D Power Amplifier 2 x 250W 100V line 1RU High and 6.8kg weight.




TOA DA250DH is a 2-Channel 100V Line Class D Power Amplifier, featuring lightweight, compact, high power output, and high efficiency. It delivers 2x 250W per channel using dedicated amplifier stages and separate switching mode power supplies. It can be mounted in an EIA Standard 1RU slot.

The power supply unit is the heart of the amplifier. To ensure consistently high performance and reliable operation, TOA engineers have given the DA Series a system that provides power independently to each channel. This testifies to TOA’s attitude to product development.

Extremely high amplification efficiency of 80-90%, resulting in reduction in power consumption by more than 60% compared with Class-AB amplifiers.

The DA-250 Series is 1-unit size and the DA-500 Series is 2-unit size, and they can be efficiently mounted on a rack, so they require only a small installation space. Because the amplifiers do not generate much heat, 5 units can be stacked together in a rack.

Stands up to extended hours of operation. The DA amplifier has undergone a large number of rigorous tests to prove its durability. In addition, TOA has been conducting a “non-stop driving test” of the DA Series.

The DA amplifier has a comprehensive protection circuitry for protection against excessive current flow due to overload, short circuit, unusual DC voltage output, and heat sink temperature rise.

Each of the channels has its own power supply. If the power supply of Channel 1 should fail, this won’t affect the operation of Channels 2-4 (Channel 2 in case of DA-250D/DA-250DH). It is also possible to use one of the channels as a spare amplifier.




  • Class D amplifier
  • Two channels
  • 2x 250W into 100V line
  • 1RU




Power Source 220 – 240 V AC
Amplification System Class D
Power Consumption 120 W (based on EN standards) 580 W (rated output 100 V line
Input 2 circuits 10 kΩ XLR-3-31 type connector CH 1 mode ON/OFF switch (ON: PARALLEL
Rated Output 2 channels: 250 W × 2 (100 V line M4 screw terminal
Frequency Response 50 Hz – 20 kHz (-3 dB
Total Harmonic Distortion 0.1 % (1 kHz) 0.3 % (100 Hz – 20 kHz)
Protection Circuit Protection against excessive current flow due to overload short circuit temperature rise at power amp. heat sink (100 ℃ (212 ゜F) or more) temperature rise inside the unit (80 ℃ (176 ゜F) or more)
S/N Ratio 100 dB (A-weighted)
Crosstalk 70 dB (A-weighted)
LED Indicator Power (blue) × 1 Protect (red) × 2
Cooling Forced air cooling
Operating Temperature -10 ℃ to +40 ℃ (14 ゜F to 104 ゜F)
Operating Humidity 90 %RH or less (no condensation)
Finish Panel: Aluminum Case: Plated steel sheet
Dimensions 482 (W) × 44 (H) × 401.8 (D) mm (18.98 × 1.73″ × 15.82)
Weight 5.3 kg (11.68 lb)
SKU TOA-DA250DH Categories , , , ,

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